package com.rui.add;

import java.util.concurrent.CountDownLatch;

public class CountDownLatchDemo {
    public static void main(String[] args) throws InterruptedException {

        //总数是
        CountDownLatch countDownLatch = new CountDownLatch(6);

        for (int i = 0; i < 6; i++) {
            new Thread(() -> {
                System.out.println(Thread.currentThread().getName() + "Go out");
                countDownLatch.countDown();
            },String.valueOf(i)).start();
        }

        countDownLatch.await();//等待计数器归零，然后再向下执行

        System.out.println("close door");
    }
}
